The Junghans 680.72 watch movement, along with its equivalents, such as Aurore-Villeret 120, Bulova 6AH, and FHF 120, are considered to be comparable in terms of functionality and design. However, there are conflicting records regarding their interchangeability. The Bulova calibres exhibit certain distinctive features not found in the FHF calibres, suggesting that the ebauches possibly originated from Aurore-Villeret. Notably, the differences between calibres 120, 123, 132, and 172 are unknown, and it is assumed that they represent official designations for different plate shapes. The Junghans 680.72 movement is a manual wind movement that was primarily used around the year 1945.